Device for the ignition of slow-matches.



PATENTED FEB. 10, 1903.

No. 720,104 I J. VON DER BOSCH.

DEVICE FOR THE IGNITION 0F SLOW MATCHES.

APPLICATION FILED SEPT. 23, 1902 so IonmI.

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PECI-F1GATION formingpart of Letters Patent 'N l Z2b, 1() 4, datediFebrdary"1Q, 1903. Application fildBsptmhez-QS. 1902.".Sbtih1NQ, r-24,521. on; model.) i

To (ill) whom it m'dy'c'onjccritf f a citizen ofthe German Empire, and a '1zesi-, dent of Augustinerstrasse No. 1,, Essen-0nd the-Ruhr, Germany, have invented certain new and .useful Improvements in -DQViCQSf0I': the Ignition'of Slow-.Match'eaof whic'li the';

following is aspecificatioh. I

My invention relatesto a device for igniting match-cords or-slow-match es for blasting purposes, working absolntelyindependent of any The object ofmy invention is to provide a' contrivauce for the aforementioned purpose. specially adapted for use in mines or'pits on account ofitsperfectsafety. Anotheradvantage is that any number ofmatches can be ignited at one time or one match only'or sev'-* eral'matches in any desired time or intervals.

The device afiords also facilities for a .meas-l ured division of the slow-matches in certain measured lengths to determine. the time between the ignition of the match and that of the explosive in the mine and for supplying the match end with a percussion-cap to make the ignition certain whenever this should be deemed necessary or desirable. I attain these objects by the apparatus herein described and illustrated by the drawings submitted with this application.

Figure 1 is a longitudinal section of my improved apparatus for igniting slow-matches;- Fig. 2, an end view thereof; Fig. 3, a horizontalsection'on line A B, Fig. 1; and Fig. 4 a cross-section on line 0 D, Figs. 1 and 3.

The drawings show an apparatus by which twenty slow-matches may be ignited all at one time or only one or a few of them within certain intervals, to be determined as may be desired. I

As shown by the said drawings, the ignition of the matches .or match is effected within a compartment :0, which is so perfectly closed that the blast of the explosive within will in no way get in touch with the air outside. I attain this by providing the apparatus, which may be made'of any suitable material, with a special contrivance for shutting those of the openings provided for the insertion of the matches into which no match is intended to be inserted. p

The apparatus ,is more; particularly illus- -"trated by Fi 1' Dune aforesaid drawings. Y Be it known .that I, JAooBvon DE, BosoH,

The portion'of the device which is marked on 1 comprises the aforementioned compartment or powder-chamber w,*whi'c-h is closed =by' a screwed-onh'ead -pi'ece' b. The powder or other, explosive by which the match or matches are to be ignited are put iuto'said compart ment through a'fii nnel-shapd opening on-the top'anid twoiconical' cocks c," the space b tween saidcocks bein'g'nsed as"a"measure or the quantity of powder to beput into said chamber'w; For placing the powderinto the same; the, upper cock is' turnedopen, the aforemention'c'd- (space y iill'ed with-powderand-closed again. Thenthe' lower cock cwill be-opened, so that the'powder drops into the chamber as,

and alsoclosedf In order-to prevent any powder intended for 'explosion in chamberm from getting ou't-Iof the device, cachet the aforesaid cocks may be'providd with'a spring or'other devicefoi-the' autoni'atic'tight'closing' 'of'the cocks at'on'ce' after'use. Y

In the lower portion of the apparatus there are provided anumber of channels 7, arranged side by side and above each other, and

suitable sliding bars 61, by which all of the said channels or only a few of them maybe tightly and fireproof closed. Th'echannels leading to, the compartment 00. (See Figs. 2 and 3 of the drawings.) At the bottom of the chamber :0 there are vents a, leading to a box-trap e. per-strip match f, while on aplace just opposite a ratchet-wheel s,with a ratchet or pawl,

is provided, pressing toward a spring or hammer h, whichwhen flinging from the said ratchet or pawl hits the match-strip at the place indicated by p, igniting the explosive substance'on the same. The sparks produced Within the latter there isa paby the ignition enter the chamber a; through the vents and explode the powder or other substance in the compartment; In the apparatus illustrated by the draw ings the spring is actuated by the ratchet: wheel 5, th spindle of which takes, up the match-strip, winding 01f from they place indicated on the drawings by t. The match-cords are inserted into the channels 0', as is shown in Fig. 3, and put in until arrested by the narrowing of the channels. When the. powder explodes, all of the match-cordsinserted will ignite and are then removed ready for use.

"Those of the channels which'contain no match ends are tightly closed by thev sliding bars 11,

so that an escape of the flame is impossible, The sliding bars are. so arrangedthat they cross a cavity m within the channels 1' and can shut or open all of the channels '1' or a number of them, according to want. The sliding bars may be round or flat. They may also be provided with a screw-thread and screwed into the aforesaid cavity rm.- In the drawings they have small notches to catch a'spring-latch k,

.holding the bars fast to the mouths of the channels and preventing an accidental moving of the bars andat the same time indicating by catching another notch the place where any of the channels are not shut. Opposite to the spindle on which the small wheels, actuating the spring h, moves there is provided a device for cutting the slow-match, and opposite to this device there is a contrivance for pressing a percussion-cap to one end of the slow-match. Thematch is put into the mouth 0' and the knife pressed downward against the direction in which the action of the spring works, and the match is thus cut through.

This cutting device renders a division of the I match. and cutting exact lengthsaccording to measure possible and of the exact time how long the'match will burn until it ignites the explosive in the pit.

The percussion-cap is put to one end of the match and inserted into the opening u, whereupon the knife I is moved downward. A

' notchfiin the latter will thereby exert a pressure upon the cap at the end of the match,

squeeze it slightly, and cause it t-o'hold fast.

thereon. If the match-cord has been propenables a prediction erly prepared, no cap will of course benecessary. [A safety-valve may also be attached to the explosion-chamber of the apparatus to avoid any too-strong pressure caused by a too-heavy explosion.

What I claim as my invention, and desire ,to protect by Letters Patent, is-

1. An apparatus for igniting slow-matches composed of a powder-chamber, channels communicating therewith, slides for closing said channels, and means for-igniting'the powmatch-exploding hammer in said trap, substantiallyas specified. v

4. An apparatus for igniting slow-matches composed of a powderchamber; channels communicating therewith, means for igniting the powder in said chamber, and a notched cutter adapted to sever and cap the slow- -match, substantially as specified,

, Signed by me at Dusseldorf, Germany, this 5th day of September, 1902.

JACOB VON DER BOSCH.

Witnesses WILLIAM EISSENWEIN. PETER LIEBER. 

